ROW UNIT FOR A SEEDING MACHINE WITH PNEUMATIC SEED LOADING

Abstract

A row unit (14) for a seed drill (10), the row unit (14) comprising: a seed hopper (28); a seed metering arrangement (16) including a metering element (24) having a seed side (38) facing the seed hopper (28) and a non-seed side (40) opposite the seed side (38), wherein the metering element (24) is operable to selectively move seed from the seed hopper (28), and a pump providing a pressure differential between the seed side (38) and the non-seed side (40) to adhere the seed to the metering element (24); a conveyor belt with an inlet for receiving the seed and an outlet configured for ejecting the seed from the seed drill (10), the conveyor belt comprising a belt (34), that can be moved from the inlet to the outlet;and a pneumatic seed distributor (36) with a nozzle (90) for bundling air, wherein the nozzle (90) is arranged next to the metering element (24), and wherein the nozzle (90) is configured to expel the air towards the metering element (24) to direct the seed from the metering element (24) to the conveyor belt, wherein the metering element is a first metering element (24), wherein the seed metering arrangement (16) further comprises a second metering element (24'), wherein the conveyor belt is arranged between the first and the second metering element, wherein the seed distributor (88) is a first seed distributor and the nozzle is a first nozzle (90), which further comprises a second seed distributor containing a second nozzle (90') for bundling air, wherein the second nozzle (90') is next to the second metering element (24') is arranged and wherein the first and second nozzles (90, 90') are configured to expel air inwards towards the conveyor belt.;

Description

CROSS-REFERENCE TO RELATED REGISTRATIONS

[0001] This application is a partial continuation of US patent application No. 14 / 869,723, filed on September 29, 2015, which claims priority over US preliminary patent application No. 62 / 077,030, filed on November 7, 2014, the entire contents of which are incorporated herein by reference. BACKGROUND

[0002] The present disclosure relates to a row unit for a seed drill, such as a row planter for agricultural applications. In particular, the present disclosure relates to a row unit with a seed metering unit and a seed ejection mechanism. SUMMARY

[0003] A row unit for a seed drill comprises a seed hopper and a seed metering assembly with a metering element facing the seed hopper on the seed side and opposite it on the non-seed side. The metering element is operational to selectively move the seed from the seed hopper. A pump creates a pressure differential between the seed and non-seed sides to cause the seed to adhere to the metering element. A conveyor belt has an inlet for receiving the seed and an outlet configured to eject the seed from the seed drill. The conveyor belt includes a belt that is movable from the inlet to the outlet. A pneumatic seed distributor includes a nozzle positioned next to the metering element to concentrate air. The nozzle is configured to expel air towards the metering element in order to direct the seed from the metering element to the conveyor belt.

[0004] A method for dispensing seed from a metering element in a seed drill, wherein the seed drill comprises a seed hopper, a seed metering arrangement including a metering element having a seed side facing the seed hopper and a non-seed side opposite the seed side to allow selective seed transport from the seed hopper, and a conveyor belt with a movable belt for receiving seed and an outlet configured for ejecting the seed from the seed drill, comprising providing a pressure differential within the metering element to cause seed to adhere to the metering element. The method also comprises injecting seed into the movable belt using air directed towards the seed.

[0005] A row unit for a seed drill comprises a seed hopper and a seed metering arrangement with a metering element, wherein the seed side faces the seed hopper and the non-seed side is opposite the seed side. The metering element is operational to selectively move the seed from the seed hopper. A pump provides a pressure differential between the seed side and the non-seed side to cause the seed to adhere to the metering element. A conveyor belt has an inlet for receiving the seed and an outlet configured for ejecting the seed from the seed drill. The conveyor belt includes a belt that is movable from the inlet to the outlet. A pneumatic seed distributor comprises a line coupled to a compressed air source, the line having an outlet located adjacent to the metering element.The outlet is configured to expel compressed air towards the metering element to direct the seed from the metering element to the conveyor belt.

[0006] Other aspects of the revelation become apparent through consideration of the detailed description and the accompanying drawings. List of characters Fig. Figure 1 is a perspective view of a seed drill. Fig. 2 is a top view of the seed drill from Fig. 1, which is coupled to a towing vehicle. Fig. Figure 3 is a side view of part of a seed metering arrangement and a seed tube for the seed drill of Fig. 1. Fig. 3A is a front view of part of the in Fig. 3 shown arrangement for seed dosing. Fig. 3B is an alternative side view of part of a seed metering arrangement and a seed tube for the seed drill of Fig. 1. Fig. Figure 4 is a schematic side view of a seed distributor for the seed drill of Fig. 1. Fig. 4A is an alternative schematic side view of a seed distributor for the seed drill of Fig. 1. Fig. Figure 5 is a schematic front view of the seed distributor of Fig. 4A. Fig. Figure 6 is a schematic front view of an alternative implementation of the seed distributor of the Fig. 4-5. Fig. Figure 7 is a schematic front view of another alternative implementation of the seed distributor. Fig. 4-5. Fig. Figure 8 is a schematic front view of another alternative implementation of the seed distributor. Fig. 4-5. Fig. 8A is a schematic side view of part of the seed distributor of Fig. 8. Fig. Figure 9 is a side view of part of the seed metering arrangement and a seed ejection mechanism with an alternative seed injection mechanism. Fig. Figures 9A-10 are side views of part of the seed metering arrangement and seed ejection mechanism with another alternative seed injection mechanism. Fig. Figure 11 is a side view of the seed injection mechanism of Fig. 9A with a dual arrangement for seed dosing. Fig. Figure 12 is a front view of the seed injection mechanism of Fig. 11. DETAILED DESCRIPTION

[0007] Before embodiments of the disclosure are explained in detail, it should be noted that the disclosure is not limited in its application to the details of the construction and the arrangement of components set forth in the following description or illustrated in the accompanying drawings. The disclosure may support other embodiments and may be practiced or implemented in various ways.

[0008] The Fig. 1-2 place a seed drill 10 such as a row seed drill, which is pulled by a vehicle 100 is pulled, such as by a tractor ( Fig. 2) The seed drill 10 has a frame 12 on which a large number of individual row units 14 are mounted. Seed sources, such as storage tanks. 13a - 13c, hold seeds, which are, for example pneumatically, attached to a mini-funnel (not shown) on each row unit 14 can be directed. The storage tanks 13a - 13c can be transmitted via lines 20 , for example hoses, and connected to the mini-funnels via a pressurized ejection device (not shown). Each storage tank 13a - 13c It can be used to hold the same type of seed or different types of seed. For example, a first storage tank can 13a a first type of seed contained, a second storage tank 13b It can contain a second type of seed, and a third storage tank. 13cA third type of seed may be included. The varieties typically belong to the same cereal species (such as corn, soybeans, etc.), with each variety exhibiting different characteristics, thus enabling optimal varietal diversity to be planted in a specific location within a field. These characteristics may include the seed's tolerance to diseases, drought, moisture, pests, and other seed traits. Thus, each row unit can contain 14 with multiple lines 20 be coupled so that each row unit 14 with each storage tank 13a - 13c It is coupled to receive the first, second, and third types of seed. In other implementations, the storage tanks can 13a - 13c contain the same type of seed.

[0009] Each row unit 14 has a frame 18 , at which the components of the series unit 14 are mounted. For example, the frame can18 furrow opener discs 19 wear to create a furrow 15 with an open furrow in the soil under the seed drill 10 to form, into which the seeds are deposited, and locking wheels 21 , to create the furrow above the placed seed in the furrow 15 to close. The frame 18 can also be a pressure roller 84 ( Fig. 3) carry to place the seed in the soil of the furrow 15 to press, or a compaction wheel (not shown) to firm the soil over the deposited seed after the furrow has been closed.

[0010] As in Fig. Figure 3 shows an arrangement for seed dosing. 16 , which have one or more seed dosing elements 24 features, with each row unit frame 18 coupled. The arrangement for seed dosing. 16 is via the lines 20 with one or more of the storage tanks 13a - 13cconnected. The arrangement for seed dosing 16 can have one, two, three or more dosing elements 24 exhibiting features that are compatible with each row unit frame 18 are connected. Fig. 3, Fig. 3B, Fig. 4, Fig. 5, Fig. 6 and Fig. 9-10 represent a single dosing element 24 but two or more dosing elements 24 can be used in any of these implementations, as in the examples that use two dosing elements. 24 , 24' in the Fig. 7, Fig. 8 and Fig. 11- Fig. Show 12. Each dosing element 24 removes the seeds from a seed container 28 , who carries a seed supply ( Fig. 4), and sequentially ejects individual seeds (metered seeds) piece by piece (e.g., singling out and metering the seed). One or more of the metering elements 24They use a negative air pressure difference (e.g., a vacuum), as described in more detail below, to deliver seeds to the metering element. 24 to adhere. This can be in the form of a disc, a bowl, or generally a plate, and have openings. 26 have openings that extend through the dosing element. 26 are generally arranged around a dosing axis A , essentially in a circle, near an outer edge of the dosing element 24 arranged. The dosing element 24 can be powered by a motor 30 , for example an electric motor, or be driven by any other suitable drive mechanism, such as a transverse hexagonal shaft driven by a ground wheel or an electric or hydraulic motor, and coupled to individual metering elements by chains or drive cables, etc.

[0011] Regarding the Fig. 4-7 is the seed container 28 , which contains a seed supply, on a seed website 38 each dosing element 24 positioned on a lower section of it and connected to one or more of the storage tanks 13a - 13c connected, in order to communicate via the lines 20 To receive seeds from them... Thus, the seed page 38 the seed container 28 Facing the direction. A pressure difference is created via the metering element. 24 from the seed side 38 of the dosing element 24 to a non-seed page 40 of the dosing element 24 through the openings 26 applied. In the examples shown, a negative pressure or vacuum applied to the non-seed side provides 40 A suction force is applied, which draws a seed S onto the seed side of the metering element. 24 at the openings 26adheres. The pressure difference is created in a vacuum zone. 42 , which in Fig. 4 is shown, over a part of the dosing element. 24 and thus through some, but not all, openings 26 applied. The vacuum zone 42 is formed by a vacuum chamber formed by the metering housing or cover and a seal that connects to the non-seed side of the metering element. 24 The intervention is defined. In the implementations shown, the pressure difference attracts the seed to the seed side. 38 of the dosing element 24 to which it adheres. To dispense a single seed (e.g., to dose or isolate the seed), the vacuum is interrupted at a desired dispensing position in an area referred to here as the vacuum barrier. 44 is referred to as the vacuum barrier. 44 is an area that extends in a circumferential direction with respect to the dosing axis Xis located directly next to the vacuum chamber, with the vacuum barrier 44 not under the influence of the pressure differential. Mechanical and / or pneumatic assistance (as described in more detail below) is used to move the seed from the metering element. 24 to push, pull or press the opening 26 to disrupt the pressure differential or otherwise release the seed. The mechanical and / or pneumatic assistance described below can be applied to the vacuum barrier. 44 be arranged or used without a vacuum barrier, while the seed is guided by the pressure difference at the metering element. 24 adheres. In other implementations, other types of dosing elements may be used. 24 It can be used for metering / singling seeds. In further implementations, instead of applying a vacuum to the non-seed side of the metering element,24 An overpressure is applied on the seed side to press the seeds S against the metering element. 24 to adhere. It should be noted that "above" and "below" are relative terms. The terms "overpressure" and "underpressure" are therefore intended to describe relative pressure conditions within a pressure difference. For example, overpressure is a pressure that is higher than its surroundings (e.g., higher than atmospheric pressure or another pressure in the seed drill). 10 ), and a negative pressure is a pressure that is lower than its surroundings (e.g., lower than atmospheric pressure or another pressure in the seed drill). 10 ).

[0012] A seed distributor 36 is next to the metering disc(s) 24 arranged to release a seed from the metering element and move the seed towards or in the direction of the furrow 15 to move, as described below. In general, the seed distributor promotes36 the detachment of metered seeds from one (or both) of the metering elements 24 and the movement of the metered seeds towards or in the direction of the furrow 15 The implementations of the seed distributor described herein are pneumatic seed distributors that use air to dispense metered seeds either by pushing or pulling the metering element. 24 They can be used in combination with mechanical assistance, as described in more detail below.

[0013] Regarding the Fig. 4-5 provides an air pressure source, such as a blower. 46 or a pump, pressurized air to a main line 48 with a Venturi nozzle 50 (e.g. a constriction, an orifice, etc.), which is located next to the vacuum barrier. 44 of the dosing element 24 is arranged. In particular, the Venturi nozzle 50 next to the dosing element 24in an axial direction (parallel to the axis) A ) on the seed page 38 of the metering element next to the vacuum barrier 44 arranged. An entrance 52 (such as an opening) into the pipe 48 It may be provided at the narrowing to allow access on the seed side. 38 of the dosing element 24 to provide suction power. Thus, the Venturi nozzle 50 on the seed page 38 a pressure drop is prepared, which here is called the Venturi zone. 54 is referred to as the seed from the metering element. 24 away and into the line 48 to pull. It is arranged in such a way as to do this at a point immediately adjacent to one end of the vacuum zone. 42 (in the vacuum lock 44 ) to do... Thus, the Venturi nozzle 50 arranged so that it attracts a seed during or shortly after the vacuum by which the seed is drawn to the metering element 24The connection is interrupted. In other implementations, the Venturi nozzle can... 50 in or next to the vacuum zone 42 be arranged to place a seed from the metering element 24 to attract, even when the vacuum is still being used to adhere the seed.

[0014] A separating lamella 56 ( Fig. 5) can be found on the seed page 38 of the dosing element 24 be arranged to mechanically insert the metered seed into the pipe 48 and in the direction of the seed ejection mechanism 32 to promote or guide. The separating lamella 56 may include a louver, a flap, a projection, or any projecting element extending from the line 48 extends and is formed with or separately from the line. The separating lamella 56 is in relation to the series unit frame 14 immobile, while the dosing element 24with regard to the series unit frame 14 and with regard to the separating lamella 56 rotates. The separating strip 56 can with the line 48 be coupled or separated. The distal end of the separating lamella 56 can come into contact with the dosing element 24 be arranged or close to the dosing element 24 be arranged to touch at least the metered seed S while it is being moved by the metering element 24 is spaced apart. The distal end of the separating lamella 56 It can be blunt, sharp, rounded, or pointed, have a knife edge, or any other suitable design. The separating lamella 56 can be flexible and attached to the dosing element 24 to be attached. The separating lamella 56 is in the Venturi zone 54 arranged to mechanically insert the metered seed into the pipe 48 to guide them, thereby connecting them to the Venturi nozzle 50working together to deliver the measured seed into the pipeline 48 to pull the Venturi nozzle 50 can be used with or without the separating lamella 56 can be used. The separating strip can also be used. 56 without the Venturi nozzle 50 be used.

[0015] In addition to the lower pressure of the Venturi nozzle 50 , which places the seed into the conduit 48 If the seed distributor pulls 36 also use overpressure to assist in releasing a seed from the metering element ( Fig. 5) A pressure relief line 60 , for example a tube or a hose, can be connected to the outlet of the blower. 46 be connected and / or may have overpressure from the main line 48 in a common connection to the pressure source. In other implementations, the overpressure line can be used. 60 It must be coupled to a separate pressure source. The line 60ends in a nozzle 58 , which are next to the non-seed side of the dosing element 24 along the path of openings 26 at or immediately after the vacuum lock 44 is arranged. The nozzle 58 can in relation to the framework 12 be fixed. The air pressure from the nozzle 58 goes through the openings 26 towards the seed side 38 of the dosing element 24 and can the metered seed be removed from the metering element 24 into the main line 48 Push, shove, or blow off. The overpressure can be applied continuously or in the form of pulsating bursts of air. Pulsating bursts of air can be directed towards passage through any opening. 26 into the vacuum lock 44 be time-coordinated and can be controlled by a valve (not shown) in the overpressure line. 60 be provided. The nozzle 58can be used with or without the Venturi nozzle 50 and with or without the separating strip 56 can be used. The Venturi nozzle 50 can be used independently or with the separating strip 56 alone or with the overpressure nozzle 58 alone or both with the separating lamella 56 as well as with the nozzle 58 be used.

[0016] As an alternative to the fixed nozzle 58 can the seed distributor 36 a rotating ejector wheel 74 exhibit, as in Fig. 8 shown. The ejector wheel 74 includes a hub 76 , which are rotatable about an axis B is mounted, and a multitude of protrusions 78 , which generally extend radially with respect to the axis B extend. The ejector wheel 74 is on the non-seed side 40 of the dosing element 24 arranged so that a lead 78one after the other, at least partially into or completely through one of the openings 26 of the dosing element 24 extends while the ejector wheel 74 This rotates the hub through the interlocking of its projections. 78 with the dosing element 24 Driven to rotate. A flow path. 80 can pass through a channel through the ejector wheel 74 between an inlet and an outlet. The inlet can be arranged in the hub such that the flow path 80 initially, generally axially into the ejector wheel 74 extends, and the outlets can be found at the distal ends of each of the projections. 78 be arranged so that the flow path 80 then generally radially out of the ejector wheel 74 extends outwards. Thus, the protrusions 78 designed as air nozzles. An air source, such as a blower. 46or another independent air source, such as another blower, compressed air, etc., supplies the ejector wheel 74 with compressed air. The ejector wheel 74 can with the line 60 It must be coupled to receive pressurized air from the air source. The ejector wheel 74 It can be configured to expel air continuously or only when a protrusion occurs. 78 into an opening 26 of the dosing element 24 begins or is about to begin. For example, all protrusions 78 continuously expel air, or the ejector wheel 74 may include a seal (not shown) or other suitable structure that covers all the protrusions 78 closes, which is not at or near the opening 26 be located, and only allow the air to pass from a ledge 78 , which is located at or near the opening 26 is arranged, is ejected. The protrusions78 provide a focused airflow that passes through the opening 26 is directed at the metered seed S. The advantage 78 mechanically and pneumatically pushes the seed S away from the metering element. 24 away and in the direction of the furrow 15 .

[0017] As another alternative to the fixed nozzle 58 can the overpressure line 60 to a hyperbaric chamber (not shown) on the non-seed side 40 lead.

[0018] The seed distributor 36 can also be an air blade 64 contained as shown schematically in Fig. 6 is shown. The air blade 64 can a nozzle 66 , including an outlet or other means of air bundling configured to deliver a focused stream of high-velocity compressed air directed towards the seed side 38 of the dosing element 24 in the vacuum lock44 is directed. In particular, the nozzle 66 on the vacuum lock 44 directed, which are located immediately next to the vacuum zone 42 is located, and in a circumferential direction onto an area of ​​the dosing element 24 , which is not affected by the pressure difference, causing the seed grains S to reach the metering element 24 The term "immediately adjacent" can refer to an area within 5 degrees of an angle (around the dosing axis). A ) one end of the vacuum zone 42 , within 10 degrees of angle (around the dosing axis) A ) of the end of the vacuum zone 42 , within 15 degrees of angle (around the dosing axis) A ) of the end of the vacuum zone 42 , within 20 degrees of angle (around the dosing axis) A ) of the end of the vacuum zone 42 etc. In particular, the air blade 64 an airflow 98on, near, above or below a metered seed in the vacuum barrier 44 surrender. The nozzle 66 It can provide a thin but relatively wide airflow, or it can provide a narrow airflow. The air blade 64 can be used with or without the separating lamella 56 , with or without the overpressure nozzle 58 and with or without the Venturi nozzle 50 can be used. For example, the air blade 64 next to the main line 48 be arranged and on the seed side 38 of the dosing element 24 in the vacuum lock 44 directly above the separating strip 56 be aligned. As in Fig. The air blade is shown in 6. 64 configured to optimize airflow 98 to the seed page 38 to hand it over, e.g. B not parallel to the seed side 38 The direction of the airflow 98can be in vector components or direction components X and Y (and Z, not shown) are split. It should be noted that the direction of the airflow 98 possibly contains no component in the Z-direction. The directional component X runs parallel to the dosing axis A and perpendicular to the surface of the seed side 38 The directional component Y runs perpendicular to the dosing axis A and parallel to the surface of the seed side 38 The directional component Z (not shown) runs perpendicular to the dosing axis. A , parallel to the surface of the seed side 38 and perpendicular to the directional component Y Preferably, the nozzle should 66 the airflow 98 in a direction that dispenses a component parallel to the dosing axis A (e.g. B . a component into the X-direction). In other implementations, the air blade can 64 be directed directly at the seed S, parallel to the surface of the metering element on the seed side 38 (e.g. B . only with one component in Y -direction). In other implementations, the air blade can 64 however, on the non-seed side 40 be directed to insert the seed S from behind through the opening 26 to blow.

[0019] Fig. Figure 7 provides an example of the seed distributor 36 that with dual dosing elements 26 , 26' is used. Parts of the seed distributor. 36 and the dosing element 24 They can be mirrored and are indicated here with a "" after the same reference number as used above. For example, the dosing elements can be 26 , 26' be arranged so that the seed sides 38 , 38'are facing each other, with the seed container 28 between the dosing elements 26 , 26' is arranged. In other implementations, separate seed containers may be used. 28 (not shown) for each dosing element 24 , 24' be present so that each dosing element 24 , 24' It attracts seeds from different seed banks. In this way, different types of seeds can be sown in a single furrow. 15 be provided. The seed distributor 36 can have a second entrance 52' in the main line 48 and a second separating lamella 56' included, both of which are next to the seed page 38' of the second dosing element 24' are arranged similarly to the first separating lamella above. 56 and the first admission 52 described. The seed distributor 36 A second overpressure nozzle is also possible 58'Included. The seed distributor. 36 It can also have two air blades 64 , 64' include the second air blade 64' arranged similarly to the above description, but with the second dosing element 24' is facing it. The seed distributor 36 can also have two separating lamellae 56 , 56' containing elements arranged similarly to those described above, but with a second dosing element 24' are facing each other. 50 , the separating lamellae 56 , 56' , the overpressure nozzles 58 , 58' and the air blades 64 , 64' can be used with the dual dosing elements 26 , 26' be used.

[0020] In the implementations shown, the blower delivers 46 the vacuum for the vacuum zone 42 on one inlet side of the blower 46 The blower 46It also provides the overpressure at one outlet side of the blower. 46 for the overpressure nozzles 58 , 58' and / or for the main line 48 with the Venturi nozzle 50 and / or for the air blade 64 , 64' In other implementations, the blower can 46 from a blower that creates the vacuum for the vacuum zone 42 provides, be separate. The overpressure nozzle(s) 58 , 58' , the main line 48 and the air blade(s) 64 , 64 ' can each have their own blower or can share one or more blowers in any combination, each providing overpressure, with one or more of the blowers also providing the vacuum for the vacuum zone 42 provide.

[0021] Regarding the Fig. 9-12 can be a mechanism for seed ejection 32 with each row unit frame 18be coupled. The seed ejection mechanism 32 receives from each dosing element 24 the metered seed grains S and guides the seed into the furrow 15 The seed ejection mechanism 32 may include a line that defines a pneumatic hose to convey seed from one or more metering elements. 24 using overpressure ( Fig. 3-3B) to the furrow 15 to be routed, as described in more detail below. In other implementations, a route may be used. 22 , or a conveyor belt, a channel for a belt 34 define (e.g. B . as in the Fig. (shown 9-12), showing the metered seeds from each metering element 24 receives, transports the metered seeds towards the ground and places the metered seeds into the furrow 15 emits. The band 34It can be driven by a motor (not shown), for example an electric motor, or by any hydraulic or pneumatic drive, as well as by various types of mechanical drives. The belt 34 can be in the form of a brush strip (e.g. B . Fig. 10) with bristles for capturing, holding and releasing the metered seeds, thereby facilitating the movement of the seed between the seed meter and the furrow 15 is controlled. In other implementations, the seed ejection mechanism can be... 32 other types of belts include, for example, a foam belt, a conveyor belt, a scraper conveyor (e.g. B . Fig. 9, Fig. 11 and Fig. 12), a belt pocket conveyor, a belt with elastic fingers, etc. In other implementations, the seed ejection mechanism can be 32include other types of mechanisms suitable for dispensing seeds from each metering element 24 to pick up and sow the seed in the furrow 15 to transport.

[0022] With renewed reference to Fig. 3. Alternatively, the seed can be sown using a pneumatic seed tube. 68 to the furrow 15 be guided. The seed tube 68 Can a line have an inlet? 72 and an exhaust outlet 70 be. The entrance 72 receives air to feed seeds from one or more metering units 24 by means of air pressure through the exhaust outlet 70 into the furrow 15 to direct. The air overpressure can be achieved by overpressure on the seed side. 38 of the dosing element 24 be provided in a pressure dispenser. This can be a nozzle. 86 on the non-seed side 40 include, in order to extract seeds from the openings 26 into the seed tube68 to blow, as in Fig. 3A shown. As an alternative to the nozzle 86 on the non-seed side 40 can an air blade 64 and / or a separating lamella 56 (like those described above) are used to dispense seeds from the metering element. 26 into the seed tube 68 to lead. In relation to Fig. 3B can use the blower 46 the overpressure for the seed tube 68 provide. For example, the main line 48 with the seed tube 68 converge and extend to the furrow 15 extend. The exhaust air from the main line 48 supplies air to the seed tube for seed ejection 68 The main line 48 and the seed tube 68 They can be designed as a single unit or as separate parts coupled together. The Venturi nozzle 50 and / or other features of the seed distributor described above 36 (e.g.B . in relation to the Fig. 4-5) can be included in this implementation. Alternatively, this implementation does not need to include Venturi nozzles or other features of the seed distributor. 36 This implementation can be used with either a pressure feeder or a vacuum feeder, as the pressure is used to eject seeds into the furrow. 15 through the blower 46 is provided. In other implementations, a different air source can adjust the air pressure in the seed tube. 68 Provide or supplement. An air brake (not shown) can be installed in the seed tube. 68 near the exhaust outlet 70 ( Fig. 3 and Fig. 3B) is provided where the seed is placed in the furrow 15 is released to increase the speed of the airflow at the exhaust outlet. 70 to reduce.

[0023] As schematically in Fig. As shown in 4A, the main line can be used in other implementations. 48 The metered seed is forced under pressure into a mechanism consisting of a belt for seed ejection. 32 (for example, the brush belt, the scraper conveyor, etc., as described above). The overpressure can be released naturally through natural openings in the seed ejection mechanism. 32 can be extracted, or there may be an exhaust vent (not shown) in the seed ejection mechanism. 32 or in the main line 48 It may be present. In other implementations, the air pressure source may include other devices such as a pressure vessel containing compressed air, a pump, an outlet, etc.

[0024] The Fig. 9 and Fig. 10 provide an alternative seed distributor 88 with a fixed nozzle 90 that is, the concentrated air from an air source 92at or near the openings 26 ejects the metered seeds S directly into the seed ejection mechanism 32 to urge. Fig. 9 represents the seed ejection mechanism 32 with a scraper conveyor 94 there and Fig. 10 represents the mechanism for seed ejection 32 with a brush band 96 the nozzle 90 is on the non-seed side 40 and at radial spacing of the openings 26 with regard to the dosing axis A arranged. The nozzle 90 is focused on the seed ejection mechanism 32 directed to place the seeds S directly into the scraper conveyor 94 or into the bristles of the brush strip 96 or another type of seed ejection mechanism 32 to inject. The nozzle 90 can be perpendicular to the dosing element 24or be arranged at an angle between 0 and 90 degrees with respect to the surface of the dosing element (e.g. B . the non-seed side 40 The seed ejection mechanism 32 can be arranged to eject the seed S from a top or a side of the mechanism. 32 to receive the air source 92 can a blower (such as the blower) 64 ) or any other suitable air source, such as a pressure vessel containing compressed air, a pump, an outlet from another component, etc.

[0025] The Fig. 11-12 represent the seed distributor 88 that has two dosing elements 24 , 24' is used, which is attached to a single row unit frame 12 are coupled, as above in relation to Fig. 7 described. The parts of the seed distributor 88They may be mirrored and are indicated herein by a ‘’ after the same reference number used above, and do not need to be reintroduced. The nozzles 90 , 90' are together pointing inwards towards the seed ejection mechanism 32 directed. The nozzles 90 , 90' can be perpendicular to the dosing element 24 , 24' or at an angle between 0 and 90 degrees with respect to the dosing element 24 , 24' The seed S can be arranged from the top or the side of the seed ejection mechanism. 32 be received. During the scraper conveyor 94 in the Fig. As shown in 11-12, it should be assumed that the brush band 96 ( Fig. 10) or any other suitable type of seed ejection mechanism 32 with dual dosing elements 24 , 24' can be used.

[0026] Fig. 9A presents an alternative to Fig. 9, where the fixed nozzle 90' on the seed page 38 of the dosing element 24 is arranged. The nozzle 90' is in relation to the dosing axis A radially inwards in the direction of the openings 26 arranged. The nozzle 90 is focused on the seed ejection mechanism 32 directed to place the seeds S directly into the scraper conveyor 94 or into the bristles of the brush strip 96 or another type of seed ejection mechanism 32 to inject. The nozzle 90' can be done in parallel with the dosing element 24 or at an angle between 0 and 90 degrees with respect to the surface of the metering element (e.g. the seed side) 38 ) be arranged. The seed ejection mechanism 32can be arranged to eject the seed S from a top or a side of the mechanism. 32 to receive.

[0027] During operation, the seed distributor promotes 36 the metered seeds pneumatically from the metering element 24 away towards the seed ejection mechanism 32 or into it. If the dosing element 24 rotates, draws in into the vacuum zone 42 The applied vacuum extracted the seeds from the seed container. 28 on the dosing element 24 Ideally, a seed should adhere to the metering element. 24 at every opening 26 The dosing element 24 It rotates and carries the metered seeds towards the vacuum barrier. 44 , where the vacuum force ends. In the vacuum lock 44 the seed distributor urges 36 the metered seeds pneumatically (e.g. B. due to overpressure and / or a pressure drop) in the direction of the seed ejection mechanism 32 or the seed tube 68 or into them. For example, the seed distributor 36 Overpressure nozzles 58 , 78 on the non-seed side 40 of the dosing element 24 through the openings 26 to use in order to dispense metered seeds from the metering element 24 to push them away. The seed distributor 36 This can also cause a pressure drop on the seed side. 38 of the dosing element 24 insert, which is from the Venturi nozzle 50 can be provided to dispense metered seeds from the metering element. 24 to push them away. The seed distributor 36 can also create a concentrated stream of overpressure air on the seed side 38 to use in order to force the metered seeds to move away from the metering element 24to release this concentrated overpressure. 64 , 64' be provided. The seed distributor 36 can the mechanical separating lamella 56 can also be used independently or in conjunction with any combination of the above-mentioned pneumatic means to remove the metered seeds and direct the metered seeds towards the seed ejection mechanism. 32 or the seed tube 68 to direct. Alternatively, the seed distributor can 88 Metered seeds directly into the seed ejection mechanism 32 or the seed tube 68 Inject. In implementations where the seed is injected by overpressure at the metering element. 24 If the seed adheres, a vacuum can be used to move the metered seeds from the metering element. 24to solve. In other words, a change from negative pressure to positive pressure or from positive pressure to negative pressure can be used to dispense metered seeds from the metering element. 24 to solve.

[0028] Thus, the disclosure provides, among other things, a pneumatic seed distributor for moving seed from one, two or more seed metering elements into or towards a furrow in the soil. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 14 / 869723

[0001] US 62077030

[0001]

Claims

[] Claimed is: [1] Row unit for a seed drill, wherein the row unit comprises: a seed container; an arrangement for seed dosing including a metering element with a seed side facing the seed container and a non-seed side opposite the seed side, wherein the metering element is capable of selectively moving seed from the seed container, and a pump that provides a pressure difference between the seed side and the non-seed side to adhere the seed to the metering element; a conveyor belt with an inlet for receiving the seed and an outlet configured for ejecting the seed from the seed drill, wherein the conveyor belt comprises a belt that is movable from the inlet to the outlet; and a pneumatic seed distributor with a nozzle for bundling air, wherein the nozzle is arranged next to the metering element, and wherein the nozzle is configured to expel the air in the direction of the metering element to direct the seed from the metering element to the conveyor belt. [2] Series unit according to claim 1, further comprising an air source which supplies air to the pneumatic seed distributor at an air pressure which is above atmospheric pressure. [3] Series unit according to claim 2, wherein the air source includes an outlet side of the pump. [4] In-line unit according to one of claims 1 to 3, wherein the nozzle is mounted on a hub and the hub is rotatably attached. [5] Series unit according to claim 4, wherein the nozzle extends at least partially through an opening in the metering element. [6] Row unit according to any one of the preceding claims 1 to 5, wherein the nozzle is arranged on the non-seed side of the metering element. [7] A row unit according to any one of the preceding claims 1 to 6, wherein the metering element comprises openings extending from the seed side to the non-seed side, wherein the nozzle is configured to expel air through the openings. [8] Row unit according to any one of the preceding claims 1 to 7, wherein the seed distributor further comprises a pressure line with a Venturi nozzle arranged on a seed side of the metering element to draw the seed away from the metering element. [9] A series unit according to any one of the preceding claims 1 to 8, wherein the metering element is a first metering element, wherein the seed metering arrangement further comprises a second metering element, wherein the conveyor belt is arranged between the first and the second metering element, wherein the seed distributor is a first seed distributor and the nozzle is a first nozzle, which further comprises a second seed distributor which includes a second nozzle for bundling air, wherein the second nozzle is arranged next to the second metering element and wherein the first and the second nozzle are configured to expel air inwards in the direction of the conveyor belt. [10] In-line unit according to any one of the preceding claims 1 to 9, wherein the seed metering arrangement comprises a housing that defines a chamber which is fluidly coupled to the pump to provide the pressure differential, wherein the seed metering arrangement further comprises a barrier arranged immediately next to the chamber, wherein the nozzle is arranged outside the chamber in the barrier.

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